The kleenex box, could be various things, but perhaps just gravity. A tissue is partly pulled out, usually held by the box that way, but relaxes and falls back in.
The bathroom door, a common occurrence in an added room if construction is not sturdy. If the room has settled so the door does not shut, there's probably at least one point at which pressure somewhere on the floor or elsewhere will change the shape enough. I have a bathroom like this, in which not only do slight variations cause flexing, but the door behaves differently according to the season. If the bathroom is attached to a porch, it's even possible someone elsewhere on the porch, or above it or below it, might be enough. A bit of wind at just the right moment might blow it shut. Many doors will shut better if pushed in a particular way, or at a particular angle. Way too many possible variants to ascribe this to anything but glitchy construction.
The trunk lid: Many possibilities, but if the trunk uses gas filled struts, these are notoriously unpredictable especially when they age and become weaker. They may hang up and lift later, sag and then recover, be in a delicate state of balance so slight that a falling acorn can change the level, or rise and fall as the sun's heat varies.
